Me again
Found this underneath the trim around the tray.
Sorted now.
The worst rust is definitely around the firewall / under windscreen / back of engine bay area - so many places to trap water. I've cut out and welded as much as I could and treated the rest. It's hard 'cos I never intended this to be a full resto but I also don't wanna cut corners and bog it.
I have stripped a fair bit in preparation for paint and I have started rubbing back a few spots of surface rust. All was going well until I sanded a tiny spot of rust on the LH sill and a hole appeared. Next thing you know, the welder is out again lol. This sill looked fine and only had a few minor spots of what looked like surface rust but I've had to cut out 2 patches as big as the one on the other side. Looks like there had been water trapped inside as the inside of where I cut out is rusted but the outside looks OK - the tiny drain holes must have blocked.
Other than body work, I've put some new bushes in the shifter and done the 'nut and bolt' mod (thanks for the tips on the forum everyone). There's a new inner CV boot, a new rear exhaust section, a rear wheel cylinder and a lower ball joint all in place too.
Still a bit to do but getting there
David